OFFSET
1,1
MATHEMATICA
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {4, 9}]>0, 1, 0], {n, 3500}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Dec 24 2023 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved